Type-writing machine.



PATENTED APR. '2, 1907.

H. S. MOGORMAGK. TYPE WRITING MACHINE.

APPLIGATION FILED SBPT. 13.1905.

3 SHEETS-33111 1.

W/ r/v ssfa- N 848,678. PATENTED APR. 2, 1907.

H. s. MQGORMAOK. TYPE WRITING MACHINE. APPLIOATIOIIILBDISEPT.18.1806.

No 848,678. PATENTED APRJ2, 1907.

H. s. MGGORMAGK.

TYPE WRITING MACHINE.

. APPLICATION FILED SEPT.13.1906.

s SHEETS-BHEET a. 3

c. 1.4, Arro/wv UNITED STATES PATENT OFFICE.

HA-RRY s. MOCORMAGK, or PROVIDENCE, RHODE ISLAND, ASSIGNOR T UNDERWOOD TYPEWRITER COMPANY,"OF NEW YORK, N; Y:, A conso- RATI/ON OF NEW JERSEY.

TY'PE-WRITING'MACHINE.

Specification of Letters Patent.

Patented April 2, 1907.

' Application filed September 13, 1 90 5. Serial No. 278,253.

To all whom, it may concern.-

Be known that .I, I'IARRY S. McCon- MACK, a; citizen'of the United States, residing 1n Providence, inthe'county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Type-Writing Machines, of which the followin -is a specification. I

. Ihis invention relates principally to special mechanism. used in type-writing machines -for moving the, paper in line-space direction.

In my pending application, Serial No. 245,916, filed February 16,1905, is illustrated mechanism for condensed charging, in

which a long record-sheet remains in the machine during the insertion, writing, and removal of a succession of bills or small sheets. After a written bill is removed the platen is rotated backwardly, a new bill inserted, and then the platen is rotated forwardly to bring the new bill into position for writing the first line thereon.

. One of the objects of thepresent invention is to make provision for leavingeither a narrow or wide space or interval between successive entries upon ,the record-sheet as may be desired.

A further object is to provide means for enablin the platen at any time to be rotated forward through a mechanically-limited predetermined arc of a variable extent far eyond the ca acity of the usual line-s acin mechanism, W ereb the machine is a apte for addressing envelbps or for beginning the writin accurately at any predetermined oint i ar below'lhe' topedge of a sheet. This 'unction I accomplish by the use of mechan ism' which is also adapted for condensed charging, so that the machine may be operated for either one purpose or the other at will.

. In carrying out this art of my invention 1 provide a crank whic is normally disconnected from the platen with means for connecting the platen to the crank, so that the. initial rotation of. the crank will cause the platen to move either backwardly or forwardly, according to the purpose for which the mechanism is being used, said means preferably includlng reversible geanng between said crank and the platen.

In the accompanying drawings, Figure 1 is a plan of an Underwood front-strike writing-machine embodying my improvements. Fig. 2 is a detail of an adjustable stop which limitsthe throw of the platen. Fig.3 is an inverted plan of a latch which serves to lock the crank in connection with the platen. Fig. A is a sectional elevation showing part of the gearing between the'crank and the platen, the parts being in normal position. Fig. 5 is a perspective/view of the latch seen at Fig. 3. Fig. 6 is a fragmentary perspective view of parts seen at Fig. 4. Fig. 7 1s a front elevation of the right-hand end of the platenfraine, illustrating the platencontrolling mechanism, which is shown in full lines in normal disconnected position and in dotted lines as connected to the platen. Fig. 8 is an end elevation of parts seen at Fig. 7, showing the parts in normal position with the crank locked against rotation. Fig. 9 is an inverted plan illustrating particularly the means for varying the space orinterval between successive records upon a record-sheet. Fig. 10 is a view similar to Fig. 9, but showing the parts adjusted for difierent spacing between records. Fig. 11 is an elevation of parts seen at Fig. 7 and also illustrating the means, for reversing the connection between the crank and the platen. Figs. 12-, 13, and 14 indicate different stages in the operation of the mechanism which locks the crank in connection with the platen.

11 designates the usual cylindrical platen of an Underwood type-writing machine fixed upon an axle 12, 'ournaled in a platen-frame 13, the ends of '0 1e axle projecting from the platen-frame and having finger-wheels 14 and 15 fixed thereon. The platen is also provided with the usual line-spacing de vices, including a line-spacing wheel 16?, rigid withthe platen and advancedintermlttently by a pawl 17, which is operated in the usual manner by aslide 17 and a lever 17", a spring-detent 17 being employed to retain the line-space wheel by engaging the notches thereof and bein adapted to ride IOC 2 32; It. will beseen ea -tn mesh therewith is a bevel-gear or curved rack of this arm the stop may be swung to any de 21 of greater radius than the pinion 20, so sired position concentrically'with the crankthat a partial revolution of said gear'may shaft 22. ,To hold the stop where adjusted, effect an entire or more-thanan entire revoa circular rack'or series of teeth 54 is prolutionof said pinion and platen. Said gear vided concentric'with said crank-shaft, the 70 21 is fixed upon a vertical hub-or shaft 22;. teeth formed at intervals to agree with the Upon the top of the'l'atter is fixed a crankteeth 18 of the line-spacing wheel 16. A roarm 23 by means of a screw 24, said'crank tative movement of the crank 23 through an havin' a manually-operable part prhandle are equal to the distance from one tooth 1o 25." he crank and gear are normally held to' the next will effect a rotation of the platen 5 up by means of a compress omspring26, but e ual to the distance from tooth to tooth 18 may be pressed down at an time to bring oi said line-space wheel. Said teeth or saio gear into mesh with sai pinion, so that; notches 54-are engageable by a tooth or dethe crank may rotate'the platez'i. "'Said'shaftf A tent ,56, formed upon the end of a bar 57,

' I 5 22 is hollow and works up' and, down, upon a, pivoted at 58 to the a-rm52, a-spring- 59 hold- 8 fixed vertical stud 2'7. Theklatter'has be; 111g said detent in engagement with said rack tween its ends a head 28, erforgted' to :fit 'or'notches and said. bar being provided with loosely u n the platen-exit; 1 2, and-fat 'its a finger-piece for convenience in elevating lower'en is attached to 'abrace 283yfixedbn thede'te-ntand moving it along saidrack. 20, the la'tend'rame. The .upper enid of the Vere-f By adjusting stop 51 in this way the stroke tica crank-shaft 22 turns ah'e'arin orlhole -'-"6f the crank 53 and platen may be regulated 30, formed in a-fixe. horizontal -"ate 31 ,'f to any'desired extent between a slight platen whichmay forjrnpartof.the, pl-aten iiame. 13;:' inrweliient and a rotation of considerablthe latter usually mounted: 'rcarria'ge' n ore than'an entire revolution, and it .will

pla a-ems; understood that by varying the propor- 9c comprisesendpieces and 34,- upen thelattions.of the gears it is practicable to eflect a tarot-which said plate" 3'1;islfastened,;whilea movement of the 'platen through-"even two "verticalplate 35, si1nilar to the jend iece 34,. revolutions or more, if desired, by a single is fixed uponsaidplaten-frame' att e righ'tvibration of the crank. In practice, how- 39 hand end of the laten and. has abearing' 36 ever, Ihave found it'necessaryto extend the for the'plateIi-ax e similarto a bearin 87 in. teeth 55 through more than about threethe end piece '34. It-will alsorbe noticed that fourths'of a 'circle',-'-as .-seen at:'Fig.- :1'. The the horizontal plate 31 isseciired by screws stop 51 may beset by reference'to a scale-63 38 tofianges 39, formed uponsaid plates 34 j upon the plate 31 the stop beingi provided,

5 and35,-thus forming 'a'rigid structure; v The with an index 64- to cooperate'said rob SpI1 I 1g .f26,WOIkS between a shoulder 41,-, scale, each graduation ofthe" seal', rreformed upon said; stud 27,' -and ashoulder'42'j s ondin'g with'oneline-sQaOe mOVeInent :oi formed within said cranksshaft 22. i-tli" I s e platen. Connection between the crank 23 and-they Bearing normally against theinnerls o platen .11 is maintained-durin the retraction --the,,foot 43 is a latch 65, pivoted "at, 66 within. 1555 iof the platen by means of. a cot-43, having the,cylindrical-support'45 and lying'between; the form "of a lug fixed upon the upper face thej 'step-44 and the plate 31 and 'pr ovided ofth bevel-gear 'fl, isaid lug being adapted witha spring 67. The" function ofthislatcli to bear against a step orjring 44, which is con-. .is-to'vibrate' outwardly over; the top of the 5 centric-With the axis 22 of, theib'evelear, .foot. 43ffwheneverf the latter mo've'sdown, no said step being formed or provided-I w'ltha therebylatcbingthe gear downinmesh with c 'lindrical ,sulport or body. 45, having a the-pinion. TTl-he-no'rmalor'inefiective-posi ange 46, the atter bein secured 'by'screiv s '-tion:of-thelatch is seen at Figs. 9, 10,-and 13.

4,7 and nuts or lugs 48' to t e under side ofthe." fAj't -FigL-14 it :will .be seen that the gear has 5o horizontal plate 31. been{. depressed-, thus permitting the latch to 15 Normally the foot or lug 43 occupies a re be swung outwardly y the spring 67, as at cess 49 formedin' the step or ring 44, but Thef latch nowf occupies a position when the crank and gear are presseddown fove'r the f'ootj43 and prevents the latter from and rotated said foot rides upon the under rising; {lhus 'itwill be seen that by pressing 55 surface ofthe step 44, the platen, of course, downthe crank-.23 the gear 21 is connected 12o bein caused to turn or oscillate with the properly with 'thep1nion 20 andflocked in crani 1 mesh. When-the'c'raIi-k is swun'g'toward the The return stroke of the crank is limited left, said foot 43' contacts with'the under side by a stop 50, fixed upon the plate 31'; butthe of the .step 44, which prevents'the. foot from ..6o-forward stroke of the crank (which, it will be rising. In other words,- the foot bearsTor i2;

, seen, effects a backward rotation of the rides against the under side'of theiste 44."

platen) is limited by an adjustable stop 51, U pon the return stroke, of the clan when I carried by anarm 52, that is pivoted loosely 'the foot 43 reaches its initial rotative posi- .upon the crank-shaft 22 and confined bya 'tion (seen at Figs. 1', 13, and 14) the foot is 65 collar 53, fixed upon the latter. -By means again prevented bythe latch from rising. i r

The hackward movement of the crank, however, continued until it reaches the fixed stop 50, so that the foot is carried back past more line-spaces, and hence the forward stroke is made greater than the rearward stroke theicof, so that the record-sheet is advanced automatically one or more line-spaces, insuring that the first line of the new bill shall not be Written over or upon the last line of the preceding record.

Upon releasing the crank the latter is iven a start forward by means of a spring inger 69, which is fixed upon the crank-shaft by means of a screw 70 and collar 70*. This spring rotates idly with said crank-shaft, but at the latter part of the return movement of said shaft aroll 69 on the spring engages a sloping edge 71 and is thereby put under sufficient tension, so that when the crank is released from the control of the operator the spring 69 retracts the shaft, gear, and crank until the foot or stop 43 reaches the normal rotative position. Thus the initial part of the forward movement of the crank between the stops and 51 is effected without turning the platen, bu t. the platen is rotated throughout the entire return movement of the crank, with the result already given, of feeding the record-sheet one or more extra line-spaces. At other times in the rotation of the crank the flanged. roll 69 is guided by the inner edge of a fixed ring 69 in which is formed the sloping edge 71. During this initial movement effected by spring 69 the foot 43 engages an. inclined face of the latch, and earns the latter to normal position.

The record-sheet, bill, and interleaved carbon maybe inserted together between the platen 11 and the usual paper shelf. They are then carried around by the usual pressure-rolls (not shown) until the proper blank line upon the bill is brought to the printing-point. T he bill is then written line by line, the ,usual line-spacing devices being employed to advance the sheets until the last line is "written. Thereupon the usual pressureroller release Inchanism may be operated to cast off the rollers, and the bill may then be withdrawn by pulling it up in front of the platen, w hile the record and carbonsheets remain in the machineundisturbed. The pressure-rolls are then permitted to re' turn to normal position, and the operator depresses the crank 23 and-pulls it forwardly as far as it wilLgo. By this 9 erationthe carbon and record sheets are re ed back for a distanceeqfial'to thespace occupied by the rinted matter on the bill-head. Then a Fresh bill is inserted and the crank is turned back as far as it will go, being arrested by the stop 50, and the spring 26 serving to disengage the gear 21 from the pinion 20, thereby permitting free rotation of the platen in either direction. By the last movement of the crank the fresh bill is brought to the front of the laten and is then written, the carbon copy thereof succeeding the co y of the first written billupon the record. s eet, ablank line appearing between the successive records. The second bill ma then be Withdrawn and a fresh bill inserted in the described manner and the operations repeated for successive bills until the record-sheet is filled. Theysaid recess 49 in the step or ring 4.4 terminates at its rear end in an abutment 75, which incooperation with a stop 76 looks the crank 23 in normal rotative position--that is, prevents undue idle rotation of the crank. The stop 76 is adjustable for the purpose of varyingthe extent of lost motion of the crank, and hence varying the space which is left between successive entries on' the record-sheet. Said. stop 76 lies outside of the foot Band in position to be engaged by a stud 77, projecting froni said foot, and is formed on the lower edge of a slide 78, which is connected by a link 79 to a crank 80. The latter is fixed upon a short vertical shaft 81, mounted-in the )late 31 and having on its-upper end a crank or handle 82, whereby the stop 76 may be set, said handle-82 provided on its un- .der side with a tooth. 83, adapted to spring into nicks 84, formed in a segment 85, provided upon said plate 31, Fig. 1, so asto detain the stop 78 where it is set. Thesegment 85 serves. as a scale, the nicks being marked, respectively, 1, 2, and 3 to indicate the number of spaces that will be left between successive entries on the record-sheet. Said stop-plate 78 has arms 86 87, which curve around the ring 4-5 and are held thereagainst by a keeper 88 and Work between guides 89 and. 90' on one side and 91 and 92 on the other side.

henthe parts are adjusted to the positions seen at Figs. 8 and 9, the play of the foot 43 in therecess 49 is greatest and three spaces are left between the successive records on the record-sheetl- When the parts are at the Figs. 10 and 1 position, the play of the foot 49 is least and only one space is left between. successive complete entries. When the parts are in an intermediate position,

.two spaces are left betweensuccessive e'ntries} It "is only necessary for the operator to adjust the hand 82 once to elther 1,

2, or 3 on the scale 85 in order to produce the re uired interval after all entries. Thus it wil be seen that the adjustable stop 76 1in1its the idle initial movement-of the manuallyeoperable device 23 whichis either one. or the otherinto 7' effected by the spring 69, thereby causingv advance between the for-v ward and backward strokes of the platen variations in the effected by said member 23s so as to produce a larger or. smaller interval bet'ween records. Between-the gears 21and the platen-shaft 12 I provide a second bevel-pinion 93,and

both pinions are splined at'93 'to-said'shaft- 12.

ions together along the shaft, so as to bring Means are provided :fo r'sliding the .pinp o'sition for eni gs. 7'and-11.

agement with the gear 21,

' or" effecting'the' shitting movement of-the pinion I provide .a -box or 94, havin atfleaelfizendfforks 95 to engage eripheral ,grooveg.96, forme.d, 'in"hubs 97 98 of the pinions 20. 93;ij .'1he box is act'u'atedby a lever 99-, pivotedf'at its'lower .endat 100' to the strut 28*. and having a suitable connection at 1,01 t'o-the shifting box'aiqid at its upper end-inclinedforwardly and rojecting through a slot 102', formed-ma yie 103, t v

104 to" the platen-frame; .handle 105 pen; the upper endof said lever the latter may" be swung fromthe full-line to the dotted-line position at Fig. 11, thereby sliding the .box 94,,to ether with the pinions,- along the axle 1 2, I orme'dinthelower end of the slot102 -is;a detent'IOG, which forms an obstruction to the movement of'the lever between the positions Fig. 11, but yields suiiiciently, owing to the. springy nature of the strip 103, to permit such movement when 108 which operate the extremesof its movement, the lower jaw 108tendif1g to press the'l'ev'er back, and this movement being opposed by the upperjaw 107, so that in forcing -the;lever past the" obstruction 106 sprung. Thus. 0

the gear.

both jaws are slightly either pinion may be meposition and upon beingflronnected to the tion upon the plate or roll gear'21, as seen in dotted iliries;cansesthe initial rotation n1oveinent"0f"fthecrank 23 to rotate the i I crank is-arrestedby thes'top 51, 'thus bringing an envelop or sheet in t line of Writing. r

In order to enable the platen to be .there upon rotated line line independently of said stop. 51, I form the crank 23- in twoparts, one secured by the screw 24 to the crankshaft and the other (designated as 109-.) bearguide 111 pro dotted lines at Fig. "7; to

U-shaped member Y ding strip. e lattergseeu'red at its ends screws" By means ofrait has passed-thestop some cases.

' avmg. thus described my nvention, I

anlcally maintained engagement .With' j axle, of a ear, and a pair of At Fig.7 the pinion-93'issliown in effective platen forwardly fiiiitil the he proper pos1.- begin'the first the crank 23 having a pressing down the handle 25 for the purpose of connecting the gear 21 to the platen the. part 109 is brought low enough,'-as seen in be arrested by the stop 51. onsbeing released the part 109 is pressed up" y the spring 1 13",, soxthat it can pass over said stop 51 and hencealthough the latter serves to arrest the not prevent succeedi'ng l ne-s acingwof the: platen by the, ordinary mec anism: The}- platen may be fed forward line line and the crank 23 may p ,7 platen-advancing direction until the foot 43' is again 'liftedbythe s ring 26 into the recess'49 in the step 45, t ereby disconnecting plateni-stfll it does? continue to rotate idly in the .seen that in nsingenvelops, letter heads, or other sheets the stop 51,1nay be set so that when a sheet is introduced it is only necessary to depressthe handle 25.and swing it as 1 far as it will go, whereupon; the'w'riting may begin, since the sheet hasfbeennbrought to the" exact point. for beginning the first line of writing, and'thereafter the writing may continue line by line} independentlyof the mechanism. seen at the right ofFi-g. ,1. The stop 50' is provided with a slopin back, as at 14, Fig. 7, topermit the mom er 109 of the: crank to ride freely Over'theIsame after 51. V'ar ation's may be resorted to within the scope of my invention andportions of my improvements may be u'sedwithout others.

' The invention applicable to paper-rollers or'pressure-rollers, as'well as to platens in cla1m-' 3 .1 In a, type-writing machine, the combination with a revolu-ble'platen, of a rotatable finger-piece, and reversing-gear connecting said'finger-pieoetothe platen.

-2. ,In'a type-W'riting-machine, the combination-with a revolublez platen havin pinions s l to said 'ax' e one uponeach side of sai and engageable with the latter sin 1y.

- 3.- In -.a type-'writin nation with arevolu axlef'of a gear, said axle one u engageable 1e platen having neach side of-said gear, and

ing them to and fro upon the platen-axle.

'4. In a type-writing machine, the combination with a revoluble pair of pinions connected tate therewith said gear, andtaini'ng engagement of said pinions;

5. In a'type-writin to the platen to roof said gear with either machine, the combi axle, of a gear, a pair of pimofis-u on opposite .-'sides of said gear, said pimoms ined to said a med gfi 'i the latter singly, and a fin-' ger-ple'ce connected to said pinionsfor mov platen of a gear, a

, one pinion upon each side df. means for mechanically mam ion machine, t e combian f; a pa r of p1n1ons sphned-to "nation with a revolu' leiii-atom, having an axle, a lever controlling said pinions, and means for mechanically maintaining either of said pinions in engagement with said gear.

In a type-writing machine, the combination with a revoluble platenhaving an axle, of a gear, a pair of pinions upon opposite sides of said gear, said pinions splined to said axle, a sliding box Connected to said pinions, a shifting lev'er connected to said ox, and a pair of spring-jaws between which said lever projects, said jaws provided with means for detaining said lever at the extremes of its box-shifting movement.

7. In a type-writing machine, the combination with a revolubleplaten and a linespacing mechanism, of a rotatable actuator normally disconnected from the. platen, means for eflectin connection between the actuator and the platen so that said actuator 'may advance the latter, a stop for arresting such advance movement of platen and actuator, whereby successive sheets may be inserted and carried around the platen and each brought to the same point for beginning the first line of writing, means permitting immediate release of the platen-and actuator from said stop withoutretracting the platen, whereby the platen may be advanced line by line immediately after its arrest by said step and independently thereof, and means for mechanically disconnecting said actuator from said platen upon its return to normal rotative position.

8. In a typewriting machine, the combination with a revoluble platen and a line s acin mechanism of a fin eriece norbeing mally disconnected from the platen, means between the linger-piece and the platen for enabling the former to rotatethe latter through about an entire revolution, and an adjustable stop for limitin the adv'ance'rotation of the platen by said iingeriece means finger-piece to effect dissociation of said stop with the platen immediately upon the arrest of the latter by said stop,'whereby after being advanced by said finger-piece to the proper point to begin the first line of writing, the platen may be immediately advanced line by line past said stop.

-9. y In atype-writing machine, the combination with a revoluble platen and a line spacing mechanism, of a revoluble fingerpiece normally disconnected from the platen, means for effecting operative connection be tween the finger-piece and platen and for mechanically maintaining such connection, so that the fingeriece may advance the platen at a single strohe through a large number of ordinary linespaces, a stop for arresting the advance-movement of the platen effected by said finger-piece, and means for mechanically dissociating said stop from said platen upon the arrestofthe platen by said stop, so that provided to cause the re ease of said abling the crank by a single stroke from its normal rotative position to effect about a complete advance revolution of said platen, an adjustable stop for arresting the platen and crank, and means for enabling the platen to be immediately advanced from its position of arrest past said stop. 1

11. In a type-writing machine, the combination with a revoluble platen and a linespacing mechanism, of a revoluble fingerpiece normally disconnected from the platen, means for effecting operative connection between the finger-piece and platen and for me-. chanically maintaining such connection, an

ad ustable stop for arresting the advance movement of the platen effected by said finger-piece, and means for enabling 'said finger-piece while still mechanically connected to'the platen, to pass by said stop.

' 12. In a type-writing machine, the combination with a revoluble platen arid a linespacing mechanism, of a revoluble fingerpiece normally disconnected from the platen, means for effecting operative connection between the finger-piece and platen and formechanically maintaining such connection, an adjustablestop for arresting the advance movement of the platen effected 'by said finger-piece, means for enabling said fm erpiece whilestill' mechanically connected to the platen, to pass by said stop; and means operating at the completion of the revolution of said finger-piece for effecting its disconnection from the platen.

13. In a type-writing machine, the combi-h nation with a revoluble platen and a linespacing'mechanism, of a crank normally disconnected from the platen, means for efi'ect ing operative connection between the crank and the platen so that by a single stroke of the crank the platen may be rotated through at least the major portion of an entire revolution, adjustable means for determining the length of stroke of the crank, and means for releasing the platen and the crank fromsaid stroke-determining means while the platen and crank remain operatively connected.

14. In a type-writin machine, thecombination with a revolub le platen and a line: spacing mechanism, of a revoluble fingerpiece normally disconnected from the platen, meansfor efiecting operative CDDIIGC'lHOILbG- tween the finger-piece and the platen, a rack curved concentrically with the axis of motion of said finger-piece, a stop adjustable along said rack, for arresting, t e platen-rotating movement of said finger-piece, and means; operating upon'the release of said finger-piece for releasing the same from said stop to permit the finger-piece and platen to I advance past said. stop.

d 15. In a type-writin machine, the combi nation with a revolub'e platen and a linespacing mechanism, ,of a rotatable finger piece normally disconnected from the platen,

nation with a revoluble platen and a line-' spacin mechanism, of a crank, movementmultilp ying gearing between the crank and the aten, said crank and platen being normal y disconnected, means for enablin' the crank to become connected with the p aten so that the movement of the crank. from nor mal position gives the platen an advance ro' tative movement, a stop for limiting the advance rotation of the platen effected by said crank, and means for enabling the platen to be thereupon immediately advanced. by said line-spacing mechanism past said stop.

17. In a type-writing-machine, the combination with a revoluble platen and a linespacing mechanism, ofv a crank, a pinion connected to the platen, a gear connected to the crank but normally disconnected from said pinion, means for enabling said gear to be moved into mesh-With said pinion, means for mechanically maintaining such connection, a stop for arresting the platen-advancing movement of said crank, and means releasing I platen'at each strokethrough several line-a the crank from said step while said gear and pinion remain inmesh.

18. In a typc writ.i 11g machine, the combi nation with a .revoluble platen and a linespacing mechanism, of a crank, a pinion connected to the platen, a gear connected to the crank, but normally disconnected from said ,pinion, means for enabling said gear to be moved into mesh with said pinion, means for mechanically maintaining such connection, a stop for arresting the platen-advancing movement of said crank, means releasing the crank from said stop While said gears remain connected; and means disconnectint said gears upon the movement of said era. to normal rot'ativc position I 19. In a type-writing machine, the combination with a revoluble laten. and a linesp'acing mechanism capallle of rotating the spaces, of a mechanism. normally disc-on neoted fromthe 'late n and capable by its initial movement rom normal position of ad; vancing the platen at a single stroke through a much larger number of line-spaces, and an adjustable stop for limiting the movementthe last+mentioned line-spacing mechan sto new -,dissociating saidp aten from said stop iinme-.

diately upon completion of said initial move- 'ment,'so-;that the. latch may be' advanced from its positiono arrest past said stop by the first-mentionedline-spacing mechanism.

20. In a'type writin ma'chinathe combination with a revolub .e platen and a linespacing mechanism, of-a crank ;-n,ormally diaconnected froin'--;the platen, imea-ns for enabling a movement of said' crank to efisct connection bet-ween the crank and the platen so that the initial-movement of the crank advances the platen, jam-strip )for arresting the platen-advancing movement of "said crank, and a s ring which immediately releases the platen om said stop upon-the f're'lease of the crank at the com letionof such initial movement of the crank. p

21'. In a typewritingmachinaffthe combination With-arevolubleplaten, ofa rotatable. fingenpi'ece normally disconnected-horn the platen, means for e ectingand'm'aintaining such cmechanicalT-connection' between the finger-piece and the platenthat the initial movementof the'finger-piece may advance the platen, a stop for arresting the platen-ad- .vancing movement of said finger pieee, and means for releasing thefinger-piece from said While the fin er-piec'e and platen are stil connected, and means for subsequently disconnecting the finger-pieoe from said platen.

22. In a type-Writing machine, the combination with,a revoluble platen, of a rotatable fingenpiece normally disconnected from the platen, means normallylocking saidfingerpiece against rotation, means for efie'cting and maintaining such mechanical connection between the finger piece and the platen that the initial rotative. movement of the fingerpieoe may advance the platen, a stop for arresting the platenadvancing movement of said finger-piece, means for releasing the fingar-piece .from said stop, whilethe fingerpiece and .theplaten are still connected, and

means for subsequently disconnecting the linger-piece from the platen, and restoring the fingenpiece'to normal locked condition when it reaches its initial rotative position.

23. In a type-writing machine, the combination With a revoluble platen, of a finger piece normally disconnected'from the platen means for efiefl'ting and maintaining connection between. the finger-piece and platen, said connecting means including a reversing gear whereby the initial movement of the fingerpiece'may becaused either to advance or retract the platen at will, and stops for arrest-. ing the forward and backward movements of 'heplaten eflec-ted bysaidlfingenplece. 7- 24. Ina type-writing maehme, the combination with a revoluble platen, of a rotatahle erpiece,- reversing-gearing -connecting said finger-piece to the p etch, and relatively fected by said finger-piece.

'25. In a type-Writing machine, the combination with a revoluble platen, of a finger-.

piece normally disconnected from the platen, means locking'said finger-piece in normal position, means for effecting and maintaining connection between said finger-piece and the platen, said connecting means including reversing-gearing, and 'relatively adjustable stops forlimiting the forward and backward movements of the platen e'il'ected by said finger-piece. a

26. In a type-w1iting machine, the combination with a revoluble platen, of a fingerpiece normally disconnected from the platen, means locking said finger-piece in normal position, means for effecting and maintaining connection between said fingerepiece and the platen, said connecting means including reversible gearing, relativelyadjustable stops for limiting the forward and backward movements of the platen eil'ected by said fingerpiece, means for enabling said fingenpieceto pass said stops, and means for disconnecting the finger-piece from the platen.-

' 27 111 a type-writing machine, the combination with arevo-lubleplaten, of a'iingerpiece no mally disconnected from the platen,

means locking said finger-piece in normal po sition, means for effecting and maintaining connection between said finger-piece and the platen, said connecting means including reversible gearing, relatively adjustable stops for liiniiingthe forward and backward move:

, inents of the platen ell'ected by said fingerpiece, means for enabling said-fingerpiece to pass said stops, and means for disconnecting the finger-piece from the platen and restoring it to its normal locked condition.

28. In a type-Writing machine, the combination with arevoluble' platen having an axle, of a gear,-a .pair of pinions' s'plined to said axle one'upon eaclisideoi' said gear, and engageable with the latter singly, said gear normally disconnected from said pinions'; a finger-piece for operating said gear, means for eil'ccting and maintaining. connection be tween said gear and either of said pinions, and relatively adjustable stops for variably" limiting the'forward and backward movements of said iinger-piece, gear and platen;

29. In a type-Writing machine, the combi-. nation with a revoluble platen having an ai lc, of a gear, a pair of inions splined tosaid. axle one upon each si e of said gear and engageable with .the latter singly, said gear twcensaid ear and either of said pin'ions,

relatively justable stops for limiting the forward. andbackward movements of said fingeispiece, gear and platen, and means for enabling the platen to be rotated independ en'tly of said stops.

30. In a type-Writing machine, the combination with a revoluble platen, of a rotatable platen may continue, a stop for limiting the return movement of the actuator to normal rotative position, and means for mechanically disconnecting said actuator from said platen upon the return of the actuator to normalrotative position.

31. In a type-Writing machine, the combination with a revoluble platen, of a rotatable finger-piece normally disconnected fr'om the platen, means locking said finger-piece in normal rotative osition, reversing-gear for effecting. operative connection between the fin-. ger-piece and platen so that the latter may be either-advanced or retracted at the initial rotation of said finger-pieee,'.means for mechanically maintaining such connection, a a stop' for limiting theinitial rotation of the finger-piece and platen, .means for mechani ically dissociating said step from said platen so that the latter may be advanced line by line independently-of said stop, a stop for limiting. the return movement of the fingerpiece, andnieansfor disconnecting the fingerpiece from the platen upon the return'sof the former to normal rotative position.

'32. In a type-Writing machine, the combination with a revoluble platen, of a revoluble finger-piece normally disconnected from the 33. In a type-Writing machine, the coiiii'iination with a revoluble platen, of a revoluble finger-piece normally disconnected from the platen, means for effecting connection be? 'tween the finger-piece and platen so that the latter may be either. advanced or retracted by the initial movement ofthe'former, rela, tively adjustablestops for limiting the backand-forth movement of said finger-piece, means .for enabling the finger-piece to .pass said stops, means for disconnecting the finge'rpiece from the platen when the former reaches normal rotative position, and means for lock ingsaid finger piece in normal rotative position. I i 34. In a type writing' machine, the combination with a revoluble platen, of a crank, a pair of pinions connected to the platen, a gear connected to the crank but normally disconnected from the pinions, means for enabling said gear to move into mesh with either inion for effecting either advance or retraction of the platen at the initial move mentof the gear, means for maintaining such connection, relatively adjustable stops for arrestin the forward and backward movemcnts c said crank, means for enabling the crack to pass said stops, and means disconnectin the gear from the pinion upon the re-' turn 0 the gear to norma 35'. In a ty nation of a p aten, a normally disconnected manually-operable device for rotating the platen, means for connecting said'manuallyoperable device to the platen, stops for lim-. iting the forward'and backward strokes of said manually-operable able means for causing the backward strokes to be variably shorter than the forward strokes of the platen that are eflected by the reciprocation of said mentally-operable devicebetween said std'ps.

36. In a type-writing machine, the combination of a revoluble platen, relatively adjustable stops for arrestin both forward and backward revolutions o mechanism controlling the strokes of the platen in such a manner as to cause one stroke of the platen to be longer than the other stroke between said stops; said stroke controlling mechanism including a part ad jnstable for causing variations in the difrot'ative position.

ference between the forward and backward strokes of the platen.

37. In a type-writin machine, the combination with a revolub e platen, of a manually-operable device for rotating the platen,

stopsfor limiting the for-ward and backwardstrokes of the platen, and .adjustable means for causing platen-retracting strokes of said manuallyopern-hle device to be ineffective.

38. In a type-writing machine, the combination with a platen, of a normally disconnected manually-operable device for rotating the platen backward and forward, stops limiting the strokes of said manually-operable device, means for connecting said manuallyoperable device to the platen and discone-writing machine, the combi device, and adjust-- the platen, and

varying initial portions of the I meetin it therefrom, means for mechanicmanually-operable device and an adjustable stop for limiting such initial movement.

39. In a type-writing machine, the combination-with alaten, of a'normally disconnected manuall -operable device for rotating the platen backward and forward, stops limiting the strokes of said manually-operable device, means for connecting said manuallyoperable device to the platen and. discon nectin it therefrom, means for mechanicsaid mamially-operable device, an adjustable stop for variably limiting such initial movement, and a finger-piece connected to said adjustable stop for setting the same.

nation .witlra able rotative evice normally disconnected from the platen, of means for enabling an axial movement of said rotative device to connect the latter to the platen, a foot upon said rotative device, a latch engaging said foot to lock said device in connection with the platen, a step for maintaining such connection during thev rotation of the platen forwardly and backwardly by said rotative device; said sto having a recess normally occupied by said foot, a spring for efiecting the, return axial movement of said'rotative device, a spring for turning said rotative device'idly in the-'-platenretracting direction while disconnected fromthe platen, and an idle. movemen I 41'. In atype-writin machine, the combination with a revolubl e platen, of a inion connected to the laten, a gear normal y disengaged from sai pinion, means for effectin engagement between said ear and sai pinion at will, relatively ac justable stops or limiting platen forwardly and backwardly, means for mechanically'maintaining said gear in mesh [for a. greater platen-advancing than platenretracting movement, and adjustablemeans forvarying thejdiflerence between the platenadvancing and laten-retracting movements. IfARRY S. McCORMACK.

Witnesses:

FLORENCE S. HASWELL,

Arron G. FEELY.

ally effecting an idle initial movement of' said adjustable, stop for variably limiting such the movement of said gear and ally e ecting "an idle initial movement of 40. In a type-writing machine, the combilaten and a manually-oper- 

